update commit script

@@ -23,7 +23,8 @@ work_dir=`(cd ${work_dir}/.. && pwd)`
 product_dir=$work_dir
 
 # allow start script from any dir
-cd $work_dir && git checkout 2.0release
+cd $work_dir && work_branch=`git branch -a|grep "*"|awk '{print $2}'` && git checkout 2.0release
+ret=$"; if [[ $ret -ne 0 ]]; then echo "switch branch failed. ret=$ret"; exit $ret; fi
 
 . ${product_dir}/scripts/_log.sh
 ret=$?; if [[ $ret -ne 0 ]]; then exit $ret; fi
@@ -76,4 +77,7 @@ sync_push --tags srs.oschina
 sync_push --tags srs.gitlab
 ok_msg "push tags ok"
 
+git checkout $work_branch
+ok_msg "switch to work branch $work_branch"
+
 exit 0